Best way to book multi-stop Asia-Pacific itinerary

[thomasdb]

Hello well-traveled friends, this is my first post!
(Posting in Qantas as that's where I have status, and my preferred airline to travel/earn with)

I'm looking to book the following itinerary (and some potential flights I'm considering):
05 Feb - PER to OKA (CX140/CX5826)
08 Feb - OKA to cough (JTA52)
10 Feb - cough to AKJ (JAL304/JAL553)
18 Feb - NRT to NAN (Fiji Airways)
20 Feb - NAN to HBA (QF3868/QF1505)
24 Feb - LST to PER (QF2070/QF769)

So far, pricing each leg individually with OW airlines, I've got a total cost of $2900 in Y.
As far as I can tell, this wouldn't be eligible for a RTW or Circle Pacific fare.
All dates are flexible +/-1 day, except for arrival/departure to Furano (AKJ; Asahikawa airport).
Potentially

Is there benefit to taking this itinerary to a travel agent?
Would one of our resident AFF TAs be the best bet?
Also wondering if we'll get a DSC promo later this year...
I'm QFF Gold, but will be Platinum shortly.
Keen for any other advice about the best way to book this!

 

[Kerrodt]

Does the Multi-City booking tool allow you to book this direct online with QF yourself?

 

[thomasdb]

No, it gives an error even if I just put in the first few legs.